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长江流域水资源总量偏多两成 用水效率有所提升

2017-08-30 22:25:38   新华网

新华社武汉8月30日电(记者黄艳)长江流域2016年水资源总量接近12000亿立方米,较常年值偏多20%。与此同时,全流域用水总量有所下降,生产生活用水效率继续提升。

长江委日前正式发布2016年《长江流域及西南诸河水资源公报》(以下简称《公报》)。根据《公报》,长江流域2016年降雨总量、地表水资源量和地下水资源量分别为21487.1亿立方米、11796.7亿立方米、2706.5亿立方米,三项均较常年值偏多。全年水资源总量为11947.1亿立方米,较常年值偏多20%。

长江流域2016年用水总量为2038.6亿立方米,其中生活用水占15.3%,工业用水占36.1%,农业用水占47.5%,生态环境用水占1.1%。2016年农田灌溉亩均用水411立方米,万元工业增加值用水量71立方米。

对比历年来公报数据显示,长江流域生产生活用水效率持续提升,工业和农业节水成效显著。用水总量比2015年减少16亿立方米,其中农田灌溉亩均用水比2015年减少30立方米,万元工业增加值用水量比2015年减少3立方米。

长江委有关专家表示,2016年水资源总量较常年偏多的主要原因是流域内降水偏多,降雨总量比常年值偏多10.9%,与此同时形成的地表径流也比常年偏深,折合径流深661.7毫米,比常年偏多近20%。而用水量减少、效率不断提升主要由于全社会生态保护意识的提升,还有节水技术和装备的普及与推广。

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